Head for extruding machines



July 1, 1930. v. ROYLE HEAD FOR EXTRUDING MACHINES 2 Sheets-Sheet 1Filed Oct. 14, 1927 IN VENTOR FKWW 5 1 ATTORNEYS July 1, 1930. v. ROYLE1,768,790

HEAD FOR EXTRUDING MACHINES INVENTOR Jig, ATTORNEY Patented July '1,1930 vnmvon BOYLE, on rn'rnnson, NEW JERSEY H 7 HEAD non EXTRUnINGMACHINES A Application filed October 14, 1927. Serial 110,226,156.

This invention relates to an improvement inhea'ds for extrudingmachines, and has for an-object to provide a device of the character'which is so constructed as to enable the ejection of tubed material 'orof strained material through a plurality of outlets, the material beingextrudedv by a single screw or plodder. i j p v e 1 V I Another objectconsists in; providing such a device in which the two outlets for theejected material are at an angle to each other. t

Another object consists-in providing such a device inwhich the chamberofthe head, immediately in advance of the screw, is fiar'ejd'forwardlyoroutwardly on lines sub stantially parallel with the longitudinal axesof the outlets. t e I A: further object consists in providing certainimprovements in" the form, construe.- tion'and arrangenient of theseveral parts,

whereby the above named and other objects may efi'ectively be attained.4

Practical embodiments of the. invention are represented in theaccompanying drawings','-in}which I f g p Fig-1" represents a plan view,partly in section, of thedevic'efitted' as a tubing ma chine;'and=' 1 iFig. Qrepresents a similar view of the device fitted as a strainingmachine.

Referring tothe form shown in Fig. 1, the =mach-ine casing, .to' whichthe head is adapted to be attached, is indicated at 1, and it isprovided Wltll'th usualbore liner represent'edat 2.0 Thezscrew-r orplodder' is marked3V i' f V T-lie 'head,'as a whole, is denoted by 4,and itis fitted to be secured to the machine casing l'by nuts 5 thatarethreaded upon stud bolts 6 protruding from th'emachine casing. It isusually desirable to 'interpose a washeror packing ring 7 between-thehead andjthe machine casing- Suitable passages 8' may be formed in thehead la' forthe circulation of a-temperature controllingmedium, as iscustomary in these devices. f

Theinterior' of the head 4, adjacent the front or outer endof thescre'w.3,:is flared outwardly as indicated'ati), and the said head is providedwith a pair of openings or holes 10, 11 which have their longitudinalaxes substantially parallel with the flaring walls 9.- This provides aplurality of outlets for the material extruded by-t'he screw 3 and aflaredchamber between the screw receiving portion of the head and theoutlets'or openings. a 4

In each of the holes or openings 10,11, W there is inserted a set oftubing elements or parts fonforining' the material into tubes, eachofsaid sets being liket he other.

The'specific form and arrangement of these tubing sets constitutes nopart of the present invention, but is covered by application for- UnitedStates paten't,filed by J amesNV. Devine, September 1,1927, Serial No.216,929. Accordingly, the said parts will merely be referred to withoutdetailed description of their construction, arrange ment, -or function.V

The core bridge is marked 12, and it is held seated in a shoulder 13formed in'the head' tiby a member 14] that is threadedintotheopeningll'. The core is marked 15 and y it has'arearextenjsion l6 anda forward eXT tension 17/ The core bridge", core, and extension 17 haveopenings therein" for the influx lot a nonadhesive powder and itsdistribution onthe inner'walls of the tube being extruded. The saidpowder may be fed in through an opening 18, shown at the right hand sidein Figwl. An annulus 19 is fitted'into'the interior of the member andheld in position by a part 20that is seated in the member l and lockedtherein by a ring nut 21., The part 20is centered by set screws-22, andit carries aring'23 that is intended to cooperate with an inner diemember2 l fitted on the core 15, to ram the opening through which thetube is extruded. The end of the extension 17 isfashioned-forthereception: of a wrenchas indicatedat25, at the right ofFig. 1. Referring to the form shown in Fig.- 2, it

may be said that the only difference lies in the substitutionof twosetsof straining'elements for the sets of tubing elements shown inFi 1.1

The said sets of straining elements are the same, so that one only willbe described. A ring 26, which is internally flared, is seated a instthe shoulder 13 of the head 4.

The said ring is L-shaped in cross section and it receives a screen 27and a foraminous plate 28, the holes of which are marked 29.

The said late and screen are held in engement with the ring 26, and thelatter is dld seated in the head 4, by a ring nut 30 that is threaded,as indicated at 31, into an opening of the head 4. The interior of thering nut is outwardly flared, but not as abruptly as the interior of thering 26. 1

The front portion of the outside of the ring nut 30 is of angularformation for the reception of a suitable wrench. k

In operation, referring to both forms, the material is urged forwardlyby the screw 3 and thence passes outwardly through the sets of tubingelements or straining elements, as the casemay be. Owing to the factthat each of'the openings 10 and 11 in the head 4 is as large in area asthe screw receiving portion or bore of the head, the effective outletfor thematerial is at least twice'the size of the said screw receivingportion so that very free movement of the material is permitted and backpressure thereof upon the screw greatly decreased. Furthermore,

when the tubing elements are employed, two

tubes-are simultaneously produced, and this arrangement facilitates t erapid extrusion of tubes of comparatively small diameter by the actionof a screw of comparatively large diameter, whichresult could not beobtained tonearly the same degree by the employnient of a single openinghead in connection with n. screw. When the straining elements are used,as shown in Fig. 2, there is a certain advantage resulting from'thefacts that the ring 26 1s flared outwardly, the screen is greater inarea than the screw receiving portion of the head, and the locking ring30 is flared outwardly. However, as these features are claimed inanother application of mine, they will not be claimed herein.

The .structure of this head is not complicated, is readily produced, andis adaptedfor use with any approved form of extruding machine.- here'i'sno difference in the form of .thehead whether it be for employment withthe tubing elements .or the strainingelements, so that its field of useis enlarged. l

It will be understood that various changes ma be resorted to in theform, construction, an arrangement of theseveral parts, withoutdeparting from the spirit and scope of my invention;lhence, I do notintend to be limited to the details herein shown anddescribed exceptasthey may be included in the claims.

. What I claim is: V

1. A head for cooperation with the screw axes of said openings being insubstantially the same plane as the axis of the screw.

, 2. A head for cooperation with the'screw of an extruding machine, saidhead having a plurality of tubular openings interconnectedadjacent thescrew for the passa e of material therethrough, the longitudinal axes ofsaidopenings being in substantially the same plane as the axis of thescrew, eac of said openings being adapted for the reception of eithertubing elements or straining elements.

3. A head for cooperation with the screw of an extruding machine, saidhead having a pluralit of tubular openings interconnected adJacent thescrew for the passage of material therethrough, the longitudinal axes ofsaid openings being in substantially the same plane as the axis of thescrew, each oflsaid openings having a cross sectional area-substantiallyas great as the cross sectional area of the screw receiving portion ofthe head.

4. A head. for cooperation with the screw of an extruding machine, saidhead having a pluralit of tubular openings interconnected ad]acent thescrew for the passage of material therethrough, the longitudinal axes ofsaid openings being in substantially the same plane asthe axis of thescrew, the combined cross sectional area. of said openings being.greater than the cross sectional area of the screw receiving portion ofthe head. i a y 5. A head for cooperation with the screw of an extrudingmachine, said head having a pluralit of tubular openings intercom nected.ad acent the screw for the passage of material 'therethrough, thelongitudinal axes of said openings being in substantially thesame planeas the axis of the screw, and a chamber formed in said head between saidopenings and the screw receiving portion of the head, said chamber beingoutwardly flared from the screw receiving portion toward the openings.6. A head for-cooperation with the screw of an extruding machine, saidhead having a pluralit of tubular openings interconnected ad acent thescrew forthe passage of material therethrough, the longitudinal axes ofsaid openings being in substantially the same plane as the axis of thescrew, and a chamber formed in said head between said openings and thescrew receiving portion of the head, said chamber being outwardly flaredfrom the screw receiving portion-toward the openings, the walls of saidchamber being substantially parallel with the longitudinal axes of theopenings.

7. A head forv cooperation with the screw of an extruding machine, saidhead having a plurality of tubular openings interconnected adjacent thescrew for the passage of material therethrough, the longitudinal axes ofsaid openings being in substantially the same plane as the axis of thescrew and diverging from a pointadjacent the end of the screw, each ofsaid openings being adapted for the reception of either tubing elementsor straining elements. 1

8. A head for cooperation with the scre of an extruding machine, saidhead having a plurality of tubular openings interconnected adjacent thescrew for the passage of material therethrough, the longitudinal axes ofsaid openings being in substantially the same plane as the axis of thescrew and diverging from a point adjacent the end of the screw, theconvergent ends of the tubular openings forming a chamber adjacent theend of the screw, each of said openings being adapted forthe receptionof either tubing elements or straining elements.

In testimony, that I claim the foregoing as my invention, I have signedmy name this 11th day of October, 1927. j

VERNON BOYLE.

